package com.briup.demo.extend;

import com.briup.demo.Book;
import com.briup.demo.Category;
import lombok.Getter;
import lombok.Setter;

@Getter
@Setter
public class BookExtend extends Book {
    // 新增属性 书籍的类目信息
    private Category category;


    @Override
    public String toString() {
        return super.toString() + " : " +category.toString();
    }
}